tezors

Hey guys, I've recently made a staking account on OSRS and I was woundering, What is better for mage boxing with 50 mage? Iban blast or slayer dart? My stats will be (when I start staking) 39 combat with 60 hitpoints, 75 (at least) strength, 1 attack, 1 defence, 51 range and 50 mage. My other question is if I go into a melee box with weapon on, say a guy with 40 attack 50 strength, will my slayers staff beat the rune scim? I have 1 attack obviously but at least 75 strength and high hp. Thanks!